Document shredder



FIG. 1 is a perspective view of the document shredder embodying my new design;

FIG. 2 is a rear view thereof;

FIG. 3 is a side view taken from the right of FIG. 1;

FIG. 4 is a top plan view thereof, the bottom being unornamented. 

The ornamental design for the document shredder, as shown and described. 